I woke up this morning, and I checked on my village. Then it says, 'another device is connecting to this village.' I had 203 gems, but my gem count went down to 128! And my barrack is upgrading for NO FREAKING REASON!!! HELP!!!
You need to contact support under the in game support function and explain in full how this has happened.
Unfortunately you have either played on another device, been to a bad web site or given out your ID.